Forward and reverse gear



' O. MICHALK L oct. 2s, 1930.

O. MICHALK FORWARD AND REVERSE GEAR oct. 23, 1930.

Filed April 10, 1930 2 Sheets-Sheet 2 om gm oo Q1 u) v w 'w Il 0 T i U i I Z Z' i E i 1 est!) f3 l *#1* @Vwv M A HWIlHlllllllllllIlIlHHl W 4l N a K Y w i .eef

Patenfed oct. 2,8,y 1930 o'rro MICHALK or rRRrrnn NEAR nREsnEN, `esem.mmf`

l FORWARD AND REVERSE GEAR Application med April 1o, 1930- seriai No.'

The'inventionrelates to a forwardfand reverse gear'return motion and adapted to be Vregulated withoutgradation. There vare gears known which work either with cogwheels or in which rolls are acted` upon by` crank pins or eccentrics toV roll in circular Y runs or runs composed of arcs. In 'gears of` this type the power supplied is transmitted either by the motiollofthe rolls or, in case of .an exclusively circular motion of the rolls, the curved rim is" rotated-to transmit the power indirectly. Moreover, in such gears,

the curved rim or the' roll system can l be idle, move or Vbe brakedcompletely, according to the desireddrivegbut in each instanceV a part of the power supplied is destroyed and vthe drivenshafty neverrcanV be loaded higher. Compared with this type of gears the inventionrconsists in providing a planet f vwheel lsystem actuated by the driving Vfshai't androlling-over-one or several rims wherein rolls are disposed at a certain equal distance Jfrom one another rand roll -overlan Veccentric disc whichl pressesA them `against a` run consisting of curves, arcs or parts thereofV and Vcommunieating` with a regulating member, the eccentric disc being firmlyconnected also with thedriven shaft andthe regulating member permitting the run to cooperate in the motion.V Itjis possible also to impart to the run suitable additional drive in the :direction of rotation of the Vdriving shaft i Y to increase-the speed 0I" the driven memberV or in the direction opposite to the direction 'of rotation of the driving shaft to reduce or reverse the rotary motion of the driven member. Y g Y o Y The regulating member may bea liquidV regulatorY orV anyV suitable braking device. Furthermore, the easing firmly Vconnected with the run maybe construc'ted'as the arma-f Vture of an electromagnet toinsure 'electric' ine adjustment. Theeccentricdisc is positioned only slightly eccentrically, and` durf-y p, ing its rotation caused by the planet Wheels 443,199, and in'eermanynprirlr, 1929.:

the` rolls orrims are pressed against the run, and as soon as the run stops, therims receive kduringtheir rolling motion a uniform rotary motion opposite tothat of the eccentric disc. 'Vhen the run is released and '50 cancooperate in the motion, the rotary speed of the drivecan be regulated according to f the degree of speed at which the run cooperates inthe motion. The extent of transmission depends on the ,numberfof rolls on' the 55y rims and on the number of arcs .making up theT run.f Thev more the runV orthe casing wherein it is Vdisposed is driven, the greater will be the speed of th-e drivenmember. If Y the run is driven ina direction opposite to 60 that of the drive, the driven shat will mover r`The 'inventionfaiords the advantage of, making use at .the'driven shaft-of the fullA power supplied tothe driving 'shaft'. Unlikeig.

thekknown types of` gears, the power .is notpartially destroyed, butcpat a lowe'rvspeed of" theidriven shaft relative to that ofV the drivingfshaft` a lcorrespondingly 'greater power can bentilized.; f Y f f One orm'of the invention'is illustrated in. i the accompanying drawing, --in'whichY Figure lis aV crosssectiononthe 'line l--lgy Fig.,y

'2, 'a crossseetion on the line 2 2, Fig; and Y Fig, alongitudmal section of the gear with 75x17V ak regulating device anda drive forthe run.

Referring' to thedrawing, l is the driving shattand'Q are the drivingcog wheelsarranged thereon anddriving'thecog wheels i 8 rotatably disposed on'a pin l0 which moves so in 'ballbearings Vlrlie cog wheels 3 engage the rims 4 between which the rollers 5 are positioned on the bolts 5 which pass-through the rims. There `iarefor.instance fourteen rollers 5. I 7 v1sr an eccentric discgthecenter of which' 85 is Aarranged eccentricallyrelative to the center oftheshaft'Lt/hedisc surrounding loose lythesha'ft l vandthe pin l0 Land being Ysecured betweenrthe dises 8, one of whichris firmly Vconnectedwiththe driven shaft 9.- 1110i 'l is a run consisting of rims, arcs or parts thereof and secured in the casing 12. There are for instance fifteen curves in the rim. 13 is a liquid regulator rigidly secured to the casing 12. On the liquid regulator a rim 14 is positioned in mesh with a cog wheel 15 driven by the bevel wheels 16. One bevel wheel is arranged on a vertical shaft on which a friction disc 17 is slidingly disposed which works between the friction discs 18 which are capable of axial displacement. 19 is a lever for the regulating device, and 20 are the two covering plates on the discs 8.

The device functions as follows:

3 by means of the gears 2. If it be assumed for better understanding that the rims 4 stand still, the wheels 3, engaging the in# terna] teeth @will rotate (see direction indicated by arrows) in the same direction as the shaftk l but at a lower speed. As the pin 1() of the wheels 3 is arranged in the two discs 8, the'latter will drive also the disc 7 eccentrically positioned between `them and so the driven shaft 9. Owing to the rotation of the disc 7, the fourteen rollers 5 will be pressed against the fifteen curves of the run 11 and moves in the opposite'direction on account of the wedge e'ect ofthe curves.` As the rims 4 are permitted to cooperate in the motion, they will rotate inthe direction 'indicated in Figs. 1 and 2 and the run 11 will be rotated in the sameV direction of the arrows. They run 11 can be stopped or re-` leased at will by the regulating device 13.

If the run 11 stands ycompletely still, the maximum speed according to pitchwill be transmitted to thediscs r7r and 8 and thus to the driven shaft. If the' run 11 is permitted to move somewhat in the direction of motion of the rims 4, the forward motion of the gears 3 and thus that of the discs 7, 8 and of the driven shaft 9 will be reduced to ther extent of the'dierence of the relative motion, andthis can be continued until the discs 7 and 8 standstill. Inthis way gearing down can be effected.l On theother hand, if the rotation of the run 11 is increased by a special drive such as the friction drive 17, 18,V

'the shaft 9, which had come to a position of rest, begins to move backward; and if the` run is driven'from its position of rest, e., when the driven shaft 9 is at maximum s eed, in the same direction as the rdriving s aft, the rotary speed of thedriven member is increased and can be further increased at will.

I claim y 1. A forward and reverse gear adapted to be regulated without gradation comprising a driving shaft, a planet wheel system driven by the said driving shaft, rims whereon the said planet wheels move, rolls equidistantly positloned between thesaid rims, an eccentric The driving shaft 1 drives the cog wheels OTT O MICHALK.

05 disc whereon thek said rolls move, a run comf f 

